The extent of the Earth’s boundaries and the beginning of space revealed that no astronauts in the history of spaceflight had left the atmosphere.

The boundary between the two lies about 465 miles (750 kilometers) beneath the Earth's surface. The crust is the outermost layer of the Earth. It is the familiar landscape on which we live ...

Earth, our home planet, is a world unlike any other ... Beyond the outer core lies the mantle, a 1,800-mile-thick layer of viscous molten rock on which Earth's outermost layer, the crust, rests.

Remnants of a liquid layer of magma near Earth's core, formed in the first few hundred million years of the planet's history, ...

Cascade PBS helps your community explore new worlds and ideas through programs that educate, inform and inspire. Your tax-deductible donation helps make it all possible. The forgotten story of the ...

However, it’s not the only factor playing a part in sustaining on our planet. Image caption, Without the ozone layer, planet Earth would be a very different place. One of those is the ozone layer.

Let’s look at how this agreement was critical in protecting the health of our planet and all its species, while also reducing greenhouse gases in the atmosphere. The ozone layer is a thin shield ...

Rare Metal The metal iridium, which is similar to platinum, is very rare on Earth's surface but is more common in asteroids and in molten rock deep within the planet. Scientists have discovered ...

And eliminating fossil fuels would reduce carbon dioxide emissions, ultimately conferring long-term benefits to the planet. L.M. Miller and D.W. Keith. Climatic impacts of wind power. Joule.

Coral reefs are one of the most diverse ecosystems on the planet. What are the abiotic and ... that are connected to one another via a thin layer of tissue (Figure 2). The connection between ...

The potential compositional boundary was typically put at 660 km ... trace elements compared with what is expected from primitive planet-building material that the Earth should, on average ...